35 lines
1.1 KiB
TypeScript
35 lines
1.1 KiB
TypeScript
import { isNumber } from 'mathjs';
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export const round = (num: number, decimals = 2) => {
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const factor = 10 ** decimals;
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return Math.round((num + Number.EPSILON) * factor) / factor;
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};
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export const average = (arr: (number | null)[], includeZero = false) => {
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const filtered = arr.filter(
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(n): n is number =>
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isNumber(n) &&
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!Number.isNaN(n) &&
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Number.isFinite(n) &&
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(includeZero || n !== 0),
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);
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const avg = filtered.reduce((p, c) => p + c, 0) / filtered.length;
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return Number.isNaN(avg) ? 0 : avg;
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};
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export const sum = (arr: (number | null | undefined)[]): number =>
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round(arr.filter(isNumber).reduce((acc, item) => acc + item, 0));
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export const min = (arr: (number | null | undefined)[]): number =>
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Math.min(...arr.filter(isNumber));
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export const max = (arr: (number | null | undefined)[]): number =>
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Math.max(...arr.filter(isNumber));
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export const isFloat = (n: number) => n % 1 !== 0;
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export const ifNaN = <T extends number>(
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n: number | null | undefined,
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defaultValue: T,
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): T => (Number.isNaN(n) ? defaultValue : (n as T));
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